I recently went to the hospital for dehydration and was given lots of fluids and now me right leg is swollen very badly what should i do?

'Too much of fluids would cause swelling on both sides so there is something else causing swelling of right side. you need to be examined by an MD. Pl see your MD

After any hospital stay tight follow up is needed with your family doc or specialist as needed. In your case, having symptoms as described that becomes even more important. If no such follow up was recommended an urgent care will be an good alternative to the local ER.